In situ synthesis of the mesoporous C–TiO2 microspheres derived from partial hydrolysis tetrabutyl titanate for enhanced photocatalytic degradation under visible light

He, Jingcheng; Liu, Qingju; Zhao, Xiangui; Zhang, Genlin; Xiao, B.L.; Fu, Kaixin

doi:10.1016/j.materresbull.2023.112168

Cited by 7 publications

(1 citation statement)

References 57 publications

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“…Also, porosity data, like specific surface area and pore diameter, are not properly discussed or even totally or partially missing in some papers in the literature [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ], neglecting possible synergies and effects granted by the catalytic supports in what regards, e.g., mass transfer. Concerning the particle size, most of the reported microspherical supports are usually very small, ranging from 0.5 to 3 µm [ 18 , 19 , 20 , 21 , 23 , 24 , 25 ], which may impose problems and extra complexity and costs in a real-life application, in what regards the setup and recovery aspects.…”

Section: Introductionmentioning

confidence: 99%

Robust Photocatalytic MICROSCAFS® with Interconnected Macropores for Sustainable Solar-Driven Water Purification

Vale,

Barrocas,

Serôdio

et al. 2024

IJMS

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Advanced oxidation processes, including photocatalysis, have been proven effective at organic dye degradation. Tailored porous materials with regulated pore size, shape, and morphology offer a sustainable solution to the water pollution problem by acting as support materials to grafted photocatalytic nanoparticles (NPs). This research investigated the influence of pore and particle sizes of photocatalytic MICROSCAFS® on the degradation of methyl orange (MO) in aqueous solution (10 mg/L). Photocatalytic MICROSCAFS® are made of binder-less supported P25 TiO2 NPs within MICROSCAFS®, which are silica–titania microspheres with a controlled size and interconnected macroporosity, synthesized by an adapted sol–gel method that involves a polymerization-induced phase separation process. Photocatalytic experiments were performed both in batch and flow reactors, with this latter one targeting a proof of concept for continuous transformation processes and real-life conditions. Photocatalytic degradation of 87% in 2 h (batch) was achieved, using a calibrated solar light simulator (1 sun) and a photocatalyst/pollutant mass ratio of 23. This study introduces a novel flow kinetic model which provides the modeling and simulation of the photocatalytic MICROSCAFS® performance. A scavenger study was performed, enabling an in-depth mechanistic understanding. Finally, the transformation products resulting from the MO photocatalytic degradation were elucidated by high-resolution mass spectrometry experiments and subjected to an in silico toxicity assessment.

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